Where does “winterbloom” come from?

winterbloom (English) comes from English Bloom, from Swedish Blom, from Swedish blomma, from Old Swedish blōme, from Old Norse blómi, from Proto-Germanic blōmô, from Proto-Germanic blōaną, from Proto-Indo-European bʰleh₃-.

Ancestry of “winterbloom”, step by step

winterbloom traces back through two separate lines of ancestry.

via English Bloom

StepLanguageWordMeaning
1EnglishBloomA blossom; the flower of a plant; an expanded bud
2SwedishBlom
3Swedishblommaa flower; wife; to flower, to bloom, to blossom
4Old Swedishblōmeflower
5Old Norseblómi
6Proto-Germanicblōmôflower
7Proto-Germanicblōanąto bloom, to flower
8Proto-Indo-Europeanbʰleh₃-bloom, flower
9Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
10Proto-Indo-Europeanbʰōl-

via English Winter

StepLanguageWordMeaning
1EnglishWinterA placename
2Middle Englishwinterwinter
3Old Englishwinterwinter; year
4Proto-West Germanicwintruwinter
5Proto-Germanicwintruzwinter
Every word from Proto-Indo-European bʰōl-Every word from Proto-Indo-European bʰel-Every word from Proto-Indo-European bʰleh₃-